Yes, there are indeed fully waterproof jackets available, designed to keep you completely dry in even the most extreme weather conditions. These jackets utilize advanced materials and construction techniques to prevent water penetration while often allowing moisture vapor to escape, ensuring comfort.
Understanding "Fully Waterproof" Jackets: What to Look For
When searching for a jacket that offers complete protection from rain, understanding the terminology and features is crucial. Not all "waterproof" claims are created equal, and the best options go beyond basic water resistance.
The Science Behind Waterproof Jackets
Waterproof jackets achieve their protection through a combination of fabric technology and seam sealing. The outer fabric is often treated with a Durable Water Repellent (DWR) finish. This causes water to bead up and roll off the surface.
Beneath the DWR, a waterproof yet breathable membrane or coating is applied. This layer has microscopic pores, too small for liquid water droplets to pass through, but large enough for water vapor (sweat) to escape. This is what allows the jacket to be both waterproof and breathable.
Key Features of Truly Waterproof Jackets
- Waterproof Ratings: Look for jackets with high hydrostatic head ratings (measured in millimeters, mm). A rating of 10,000mm or higher is generally considered good for everyday rain, while 20,000mm+ offers superior protection for heavy downpours and prolonged exposure.
- Breathability Ratings: Measured in grams per square meter per 24 hours (g/m²/24hr), this indicates how much moisture vapor can pass through. Higher numbers mean better breathability. Aim for at least 10,000g/m²/24hr for active use.
- Seam Sealing: Even the best waterproof fabric is useless if water can seep through the stitched seams. Fully waterproof jackets will have taped seams, where a waterproof tape is applied over every stitch line to create a watertight barrier.
- Waterproof Zippers: Standard zippers can be a weak point. Look for jackets with water-resistant or waterproof zippers, often featuring a storm flap or a PU coating to prevent leaks.
- Adjustable Cuffs and Hood: These allow you to cinch down openings to prevent wind and rain from entering, further enhancing the jacket’s protective capabilities.
Types of Fully Waterproof Jackets for Different Needs
The "best" fully waterproof jacket depends heavily on your intended use, whether it’s for intense hiking, daily commuting, or extreme mountaineering.
Lightweight, Packable Rain Jackets
These are ideal for hikers and travelers who need reliable rain protection without adding significant bulk. They often feature minimalist designs and highly breathable membranes.
Insulated Waterproof Jackets
For colder climates, insulated versions offer both waterproof protection and warmth. They typically have a waterproof outer shell with an insulating layer like down or synthetic fill.
Hardshell Jackets for Extreme Conditions
These are the most robust options, built for severe weather and demanding activities. They prioritize maximum waterproofing and durability, often at the expense of some breathability or weight.
Comparing Waterproof Jacket Technologies
Different brands employ various proprietary technologies to achieve waterproofing and breathability. While the core principles remain the same, the specific materials and construction can vary.
| Technology/Brand | Key Feature | Waterproof (mm) | Breathability (g/m²/24hr) | Best For |
|---|---|---|---|---|
| Gore-Tex | Widely recognized, durable membrane | 28,000+ | 10,000 – 25,000+ | All-around outdoor activities |
| eVent | Highly breathable, direct venting | 20,000+ | 15,000 – 30,000+ | High-exertion activities, wet climates |
| Futurelight | Nanospinning for advanced breathability | 20,000+ | 20,000 – 40,000+ | Technical climbing, intense trekking |
| Marmot MemBrain | Proprietary waterproof/breathable coating | 10,000 – 20,000 | 10,000 – 15,000 | Everyday use, light to moderate hiking |
| Patagonia H2No | Durable, highly water-resistant fabric | 15,000 – 20,000 | 15,000 – 20,000 | Versatile outdoor use, general rainwear |
Note: Ratings can vary significantly between specific product lines within each technology.
Maintaining Your Fully Waterproof Jacket
To ensure your fully waterproof jacket continues to perform optimally, proper care is essential. The DWR finish can wear off over time, and dirt can clog the membrane’s pores, reducing breathability.
Regular washing with specialized technical washes will help maintain the fabric’s performance. You can also reapply a DWR treatment periodically to restore water repellency. Always follow the manufacturer’s care instructions.
How to Wash Your Waterproof Jacket
- Close all zippers and fastenings.
- Machine wash on a gentle cycle with warm water and a small amount of technical wash (like Nikwax Tech Wash or Grangers Performance Wash). Avoid fabric softeners and detergents, as they can damage the membrane.
- Rinse twice to ensure all soap residue is removed.
- Tumble dry on a low heat setting for about 20 minutes. This helps reactivate the DWR treatment.
- If water is no longer beading on the surface, reapply a DWR treatment according to product instructions.
Frequently Asked Questions About Waterproof Jackets
### What is the difference between water-resistant and waterproof?
Water-resistant jackets repel light rain and snow for a short period, but they will eventually soak through. Fully waterproof jackets are designed with membranes and sealed seams to prevent any water penetration, even in heavy rain or prolonged exposure.
### How long does a waterproof jacket last?
The lifespan of a waterproof jacket depends on its quality, how often it’s used, and how well it’s cared for. High-quality jackets with durable membranes and robust construction can last many years, often 5-10 years or more with proper maintenance.
### Can a waterproof jacket still be breathable?
Yes, the best fully waterproof jackets are also breathable. They use advanced membranes that allow perspiration vapor to escape while preventing liquid water from entering. This is crucial for comfort during physical activity to prevent overheating and clamminess.
### Do I need to reapply DWR?
Reapplying DWR is recommended when water no longer beads up and rolls off the jacket’s surface. This typically happens after several washes or significant wear